Moment of inertia of a circular section about an axis perpendicular to the section is
A. $$\frac{{\pi {{\text{d}}^3}}}{{16}}$$
B. $$\frac{{\pi {{\text{d}}^3}}}{{32}}$$
C. $$\frac{{\pi {{\text{d}}^4}}}{{32}}$$
D. $$\frac{{\pi {{\text{d}}^4}}}{{64}}$$
Answer: Option C
Solution(By Examveda Team)
Moment of inertia for a circular section about an axis perpendicular to the section is given by $$\frac{{\pi {{\text{d}}^4}}}{{32}}$$, whered
is the diameter of the circle. Therefore, the correct answer is Option C. Join The Discussion
Comments ( 10 )
The resultant of two equal forces P making an angle $$\theta ,$$ is given by
A. $$2{\text{P}}\sin \frac{\theta }{2}$$
B. $$2{\text{P}}\cos \frac{\theta }{2}$$
C. $$2{\text{P}}\tan \frac{\theta }{2}$$
D. $$2{\text{P}}\cot \frac{\theta }{2}$$
A. Equal to
B. Less than
C. Greater than
D. None of these
If a number of forces are acting at a point, their resultant is given by
A. $${\left( {\sum {\text{V}} } \right)^2} + {\left( {\sum {\text{H}} } \right)^2}$$
B. $$\sqrt {{{\left( {\sum {\text{V}} } \right)}^2} + {{\left( {\sum {\text{H}} } \right)}^2}} $$
C. $${\left( {\sum {\text{V}} } \right)^2} + {\left( {\sum {\text{H}} } \right)^2} + 2\left( {\sum {\text{V}} } \right)\left( {\sum {\text{H}} } \right)$$
D. $$\sqrt {{{\left( {\sum {\text{V}} } \right)}^2} + {{\left( {\sum {\text{H}} } \right)}^2} + 2\left( {\sum {\text{V}} } \right)\left( {\sum {\text{H}} } \right)} $$
A. $${\text{a}} = \frac{\alpha }{{\text{r}}}$$
B. $${\text{a}} = \alpha {\text{r}}$$
C. $${\text{a}} = \frac{{\text{r}}}{\alpha }$$
D. None of these
D right answer
Axis perpendicular means (Izz) polar moment of inertia
Answer is A
Polar moment of interia..
Iyy is also perpendicular..then why D is not correct
We have to use perpendicular axis theorem, that give (M.O.I)zz=(M.O.I)xx + (M.O.I)yy from that we get option (c) is correct
We have to use perpendicular axis theorem, that give (M.O.I)zz=(M.O.I)xx + (M.O.I)yy from that we get option (c) is correct
We have to use perpendicular axis theorem, that give (M.O.I)zz=(M.O.I)xx + (M.O.I)yy from that we get option (c) is correct
Ny body explain it
Answer D